Warp-stop-motion mechanism for looms



F. M. DAY. WAR? STOP MOTION MEGHANISM FOR LooMs.

(No Model.)

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UNITED STATES PATENT Fries..

ELORENCE M.`DAY, OE HOPEDALE, MASSACHUSETTS, ASSIGNOR TO THE DRAPER COMPANY, OF SAME PLACE AND PORTLAND, MAINE.

WARP-STOP-MOTION MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 596,443, dated December 28, 1897.

Application filed July 9, 1897. Serial No. 643,933. (No model.) i

To aIZZ whom it may concern,.-

Be it known that I, FLORENCE M. DAY, of Hopedale, in the county of Worcester and State of Massachusetts, have invented an Improvement in Warp-Stop-Motion Mechanism for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention has for its object the production of stop-motion mechanism for looms operative upon the breakage or undue slackening of the warp-threads, the consequent movement into abnormal position of a detector holding or stopping the movement of a normally-vibrated coperating feeler.

The subject-matter of this present invention relates more particularly to the mechanism for normally vibrating the feeler, said mechanism being simple and direct-acting and bringing as little strainas possible on a detector when engaged by the feeler.

Figure l is a front elevation of a portion of a loom with my present invention applied thereto. Fig. 2 is a vertical sectional view thereof on the line x Fig. 1, looking toward Fig. 3 is a detail view to the left of the line 0c :c of the mechanism for vibrating the feeler and a portion of the releasing devices for the shipper-lever, the feeler being shown as having been stopped by a dropped detector. Fig. 4 is a detail of the segmental gearing for connecting the feeler rock-shafts, to be described; and Fig. 5 is an enlarged detail of a portion of the feeler in plan, a detector and its cooperating Xed abutment or stop being shown in section.

The lay and the harness-cams, harness-levers, and connections between them and the harness-frames are omitted for the sake of Vclearness, such parts being old and forming ceive the supporting cross-bars m3 m4 at the top and bottom of the harness-frames, which latter are reciprocated in well-known manner, a separator-bar f being interposed between the lower ends of the detectors, serving as an abutment or stop for a dropped detector of either series when engaged by a feeler, the front bar fx forming a warp-rest.

Two parallel rock-shafts 7L 7i. are mounted in4 suitable bearings on stands I-I, one being shown in Fig. l, and they are provided with arms hX, to which are attached two oppositelyturned feelers 7c 7a', vibratable in paths below and to cooperate with the detectors m m', respectively.

The preferred form for the feelers is shown in Fig. 5, wherein the feeler k is shown as slotted transversely to forni a series of tines kx, having parallel sides and beveled points,

the depth of the slots being equal to substantially one-half the width of a detector, such construction of the feeler, however, not being of my invention.

The shafts h h are connected, as shown, by segmental gears g g', to thereby rock in unison in opposite directions to vibrate the feelers in the direction of the length of the warps, the shaft h having fast thereon an arm h2, provided with a laterally-extended lug or projection h3, while the shaft 7L has fast thereon an arm h4, provided with a weight or enlargement h5, heavy enough to rock the shafts to move the feelers 7o 7o' toward each other when unopposed.

The arms h2 and h4 are extended in opposite directions, each toward the rock-shaft to which the other is secured.

By means of the weighted arm h4 and the connecting-gears g g the feelers are rocked by gravity in their vibratory movement toward the paths of the detectors.

An actuator to move the feelers in the opposite direction is shown as alongitudinallymovable bar N, forked at n to embrace the cam-shaft C,and provided with a suitable stud n to engage the outer edge of a controllingcam NX on the shaft C, said cam moving between said stud n and a toe nx on the actuator N.

The actuator is slotted longitudinally at n2 to receive a supporting and guiding stud ICO n3 on a standard N2, fast on the loom-frame A, a second longitudinal slot n4 at the upper end of the actuator receiving therein the laterallyextended lug h3 of the arm h2.

The toe nx and the weight of the actuator maintain the stud n in engagement with the cam N and effect the release of the shipperlever at the proper time.

On the actuator l have pivoted at dx, near its upper end, a dog d, provided with a tail d', having a lateral lug d2 to enter the slot n4, beneath the lug h3 of the rocker-arm h2, a weight d3, as herein shown, tending to throw the dog inward toward the actuator,the weight h5 being much heavier than the weight d3.

A knock-off arm b, fast on a rock-shaft b', is adapted to release the shipper-lever S from its notch in the holding-plate, said shaft having a second arm b2, connected by a link b3 with a rocker-arm b4, fast on ay rock-shaft b5, mounted in suitable bearings on the crossgirth A15 and extended through a hole in the loom side.

The rock-shaft b5 is provided with a second arm 196, connected by a link b7 with a bellcrank lever 198, loosely mounted on the camshaft C, adjacent the forked end n of the actuator N. Guides n10 of the latter receive a longitudinally-movable bunter t, preferably notched at its upper end at t' to be engaged at times by the dog d, the bunter being pivotally connected at 152 with the bell-crank lever 128.

When the bunter is moved in the direction of arrow 60, Fig. l, the knock-off arm b will be operated, through the intervening connections, to release the shipper-lever and thereby effect stoppage of the loom. A pin W12, eX- tended across the space between the guides n10, prevents accidental withdrawal of the bunter from its said guides.

When the loom is running properly, the cam-shaft C, rotating in the direction of the arrows 22, Figs. 2 and 3, the actuator N will be moved up, as in Figs. l and 2, by the cam N to swing the feelers outwardly, and then as the controlling-cam continues its rotation the actuator will be drawn down, permitting the weight h5 to turn the rock-shafts bygravity in the opposite direction to thereby move the feelers toward the detectors. The greater weight h5 maintains the lug h3 in engagement with the lug d2 on the dog, causing the latter to rock on its fulcrum and throwing the dog out beyond the notched end of the bunter as the dog is'moved toward it by the downward movement of the actuator.

Should, however, a detector move into abnormal position, as shown at m', Fig. 3, the inward movement of the feelers will be stopped" and the lug h3 will beheld stationary at the time that the actuator begins its downward movement. The actuator as it moves downward carries the dog with it, the. latter under the influence of its'weight da swinging into position shown in Fig. 3 to engage the bunter, and such engagement with the bunter will cause the latter to be moved with the actuator during the latter part of its downward stroke to thereby rock the bell-crank lever bs, and through the intervening connections operate the knock-oif arm Z) to release the shipper-lever.

The weight h5 is only heavy enough to overcome the friction of the parts, and therefore but littlestrain or pressure is brought upon a dropped detector by the construction herein shown.

The whole mechanism is at once simple, effective in operation, and not liable to derangement, and it will be noticed that I have do'ne away with the use of springs altogether in the stop-motion mechanism.

l-laving fully described my invention, what I claim, and desire to secure by Letters Patent, is-

l. In a warp-stop-motion mechanism for looms, a series of warp-controlled actuatingdetectors,a cooperating feeler moved by gravity toward and stopped by a dropped detector, a rocker-arm rigidly connected with the feeler, a reciprocating actuator to engage said arm and positively move the feeler in the opposite direction, a dog pivotally mounted on the actuator, and having a tail to be engaged by said rocker-arm, to normally retain the dog inoperative, combined with stopping mechanism for the loom, including a bunter adapted to be engaged and moved by bodily movement of the dog when in operative position on the actuator, stoppage of the feeler eecting movement through said rocker arm of the dog into operative position, substantially asI described.

2. In a warp-stop-motion mechanism for looms, including warp-controlled actuatingdetectors, a plurality of independently.- mounted vibratable feelers moved by gravity toward and to be stopped by a dropped detector, a reciprocating actuator to positively move the feelers in the opposite direction, connections between the feelers,to eifect their movement in unison, a gravity-dog pivotally mounted on the actuator, and a detent controlled by movement of the feelers, to normally hold said dog inoperative, stoppage of a feeler releasing said dog and permitting it to move into operative position on the actuator, combined with stopping means for the loom including a bunter to be engaged and moved by the dog when in operative position,

substantially as described.

3. In/ a warp-stop-motion mechanism for looms, a series of warp-controlled actuatingdetectors, a cooperating feeler moved by gravity toward and stopped by a dropped detector, a longitudinally-reciprocating actuator, a dog pivotally mounted thereon, and a detent movable in unison with the feeler, to normally hold the dog inoperative on the gravityactuated stroke of the feeler, said detent being engaged by the actuator to positively move the feeler in the opposite direction, combined with stopping mechanism for the loom,

IOO

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including a bunter guided by and movable' In testimony whereof I have signed my relatively to and adjacent said actuator, said name to this speoioation in the presence of 1o bunter being in the path of the dog when in tWo subscribing Witnesses. operative position due to stoppage of the T t feeler, whereby the return stroke of the ac- FLORENCE M' DAX' tuator Will, through the dog mounted upon Witnesses:

it, effect movement of the bunter and stop- T. E. CUNNINGHAM,

page of the loom, substantially as described. GEO. OTIS DRARER. 

